Electrical Engineering : Dc Generators QUESTIONS AND ANSWERS :: part2 : 6 to 10
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.The voltage drop for which of the following types of brush can be expected to be least ? |
| Graphite brushes |
| Carbon brushes |
| Metal graphite brushes |
| None of the above |
7.For a D.C. machines laboratory following type of D.C. supply will be suitable |
| rotary converter |
| mercury are rectifier |
| induction motor D.C. generator set |
| synchronous motor D.C. generator set |
8.The number of brushes in a commutator depends on |
| speed of armature |
| type of winding |
| voltage |
| amount of current to be collected |
9.Which of the following statement about D.C. generators is false ? |
| Compensating winding in a D.C. machine helps in commutation |
| In a D. C. generator interpoles winding is connected in series with the armature winding |
| Back pitch and front pitch are both odd and approximately equal to the pole pitch |
| Equilizing bus bars are used with parallel running of D.C. shunt generators |
10.The demagnetising component of armature reaction in a D.C. generator |
| reduces generator e.m.f. |
| increases armature speed |
| reduces interpoles flux density |
| results in sparking trouble |
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